//把此文件放入/usr/include   
 /*Our own header, to be included after  all standard system headers*/  
    #ifndef __ourhdr_h    
    #define __ourhdr_h    
    #include    <errno.h>/*for definition of errno */  
    #include    <stdarg.h>/*ANSI C header file*/  
    #include        <sys/types.h>   /* required for some of our prototypes */    
    #include        <stdio.h>               /* for convenience */    
    #include        <stdlib.h>              /* for convenience */    
    #include        <string.h>              /* for convenience */    
    #include        <unistd.h>              /* for convenience */    
    #define MAXLINE 4096                    /* max line length */    
    #define FILE_MODE       (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)    
                                            /* default file access permissions for new files */    
    #define DIR_MODE        (FILE_MODE | S_IXUSR | S_IXGRP | S_IXOTH)    
                                            /* default permissions for new directoris */    
    typedef void    Sigfunc(int);   /* for signal handlers */    
                                            /* 4.3BSD Reno <signal.h> doesn't define   
    SIG_ERR */    
    #if     defined(SIG_IGN) && !defined(SIG_ERR)    
    #define SIG_ERR ((Sigfunc *)-1)    
    #endif    
    #define min(a,b)        ((a) < (b) ? (a) : (b))    
    #define max(a,b)        ((a) > (b) ? (a) : (b))   
                                            /* prototypes for our own functions */    
    char    *path_alloc(int *);                     /* {Prog pathalloc} */    
    int              open_max(void);                        /* {Prog openmax} */    
    void     clr_fl(int, int);                      /* {Prog setfl} */    
    void     set_fl(int, int);                      /* {Prog setfl} */    
    void     pr_exit(int);                          /* {Prog prexit} */    
    void     pr_mask(const char *);         /* {Prog prmask} */    
    Sigfunc *signal_intr(int, Sigfunc *);/* {Prog signal_intr_function} */    
    int              tty_cbreak(int);                       /* {Prog raw} */    
    int              tty_raw(int);                          /* {Prog raw} */    
    int              tty_reset(int);                        /* {Prog raw} */    
    void     tty_atexit(void);                      /* {Prog raw} */    
    #ifdef  ECHO    /* only if <termios.h> has been included */    
    struct termios  *tty_termios(void);     /* {Prog raw} */    
    #endif    
    void     sleep_us(unsigned int);        /* {Ex sleepus} */    
    ssize_t  readn(int, void *, size_t);/* {Prog readn} */    
    ssize_t  writen(int, const void *, size_t);/* {Prog writen} */    
    int              daemon_init(void);                     /* {Prog daemoninit} */    
    int              s_pipe(int *);                         /* {Progs svr4_spipe bsd  spipe} */    
    int              recv_fd(int, ssize_t (*func)(int, const void *, size_t));    
                                                                            /* {Prog   recvfd_svr4 recvfd_43bsd} */    
    int              send_fd(int, int);                     /* {Progs sendfd_svr4 se  dfd_43bsd} */    
    int              send_err(int, int, const char *);/* {Prog senderr} */    
    int              serv_listen(const char *);     /* {Progs servlisten_svr4 servli  ten_4  4bsd} */    
    int              serv_accept(int, uid_t *);     /* {Progs servaccept_svr4 servac  ept_4  4bsd} */    
    int              cli_conn(const char *);        /* {Progs cliconn_svr4 cliconn_4  bsd} */    
    int              buf_args(char *, int (*func)(int, char **));    
                                                                            /* {Prog  bufargs} */    
    int              ptym_open(char *);                     /* {Progs ptyopen_svr4 p  yopen_44bsd} */    
    int              ptys_open(int, char *);        /* {Progs ptyopen_svr4 ptyopen_4  bsd} */    
    #ifdef  TIOCGWINSZ    
    pid_t    pty_fork(int *, char *, const struct termios *,    
                                      const struct winsize *);      /* {Prog ptyfork   */    
    #endif    
    int             lock_reg(int, int, int, off_t, int, off_t);    
                                                                            /* {Prog  lockreg} */    
    #define read_lock(fd, offset, whence, len)    lock_reg(fd, F_SETLK, F_RDLCK, offset, whence, len)    
    #define readw_lock(fd, offset, whence, len)       lock_reg(fd, F_SETLKW, F_RDLCK, offset, whence, len)    
    #define write_lock(fd, offset, whence, len)           lock_reg(fd, F_SETLK, F_WRLCK, offset, whence, len)    
    #define writew_lock(fd, offset, whence, len)           lock_reg(fd, F_SETLKW, F_WRLCK, offset, whence, len)    
    #define un_lock(fd, offset, whence, len)                  lock_reg(fd, F_SETLK, F_UNLCK, offset, whence, len)    
    pid_t   lock_test(int, int, off_t, int, off_t);    
     /* {Prog    locktest} */    
    #define is_readlock(fd, offset, whence, len)                         lock_test(fd, F_RDLCK, offset, whence, len)    
    #define is_writelock(fd, offset, whence, len)                         lock_test(fd, F_WRLCK, offset, whence, len)    

    void    err_dump(const char *, ...);    /* {App misc_source} */    
    void    err_msg(const char *, ...);    
    void    err_quit(const char *, ...);    
    void    err_ret(const char *, ...);    
    void    err_sys(const char *, ...);    
    void    log_msg(const char *, ...);             /* {App misc_source} */    
    void    log_open(const char *, int, int);    
    void    log_quit(const char *, ...);    
    void    log_ret(const char *, ...);    
    void    log_sys(const char *, ...);    
    void    TELL_WAIT(void);                /* parent/child from {Sec race_condition  } */    
    void    TELL_PARENT(pid_t);    
    void    TELL_CHILD(pid_t);    
    void    WAIT_PARENT(void);    
    void    WAIT_CHILD(void);    
    #endif  /* __ourhdr_h */  
